[SIPForum-discussion] COnference Doubt

[abhishek.chattopadhyay at wipro.com]

Hello All 

I am confused about a particular call flow scenario.
Can anybody tell me how exactly would be the messaging for the scenario
below?



There are three parties phone 1, phone 2 and phone 3.
Phone 1 registers to gateway 1
Phone 2 registers to gateway 2
Phone 3 registers to gateway 3

Ps: none of the phones are pure sip entity they register to the gateway
and the gateway takes care of the signaling on behalf of the phones as
instances as if they were UACs. 
      

SCENARIO:
1. phone 2 initiates a call to phone 1
2. phone 2 puts phone 1 on hold.
3. phone 2 initiates a call to phone 3.
4. phone 2 now puts phone 1 and phone 3 in a conference.
5. All the phones are in conference now.
6. Suddenly gateway 1(conference initiator) is rebooting.
7. Still conference continues among all phones.
8. Now phone 2 hangs up.


Questions:
1.	will the conference be still carry on between phone 1 and phone
3?
2.	what would be an appropriate signal flow among all
parties.(gateway 2 to gateway 1)   &  (gateway 2 to gateway 3)?
3.	what if the gateway 1 would not have rebooted and gateway 2 is
ganging up how would be the signaling be ?

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Regards 
 
ABHISHEK
mob:+91- 9986338807
ESN: 6-877-81342
ext: +91-80-28528857 80373


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